Welcome to issue 255 of the HWN, an issue covering crowd-sourced bits of information about Haskell from around the web. This issue covers the weeks of January 06 to 19, 201.
Quotes of the Week
- ky3: Indexed monads are just categories in the category of endofunctors, what's the problem?
- tac: I guess I'm just living in a fantasy world where the docs tell you how to use such a basic API :P
- shachaf: 3.0 is an edwardk phase, not just a version number. It's like Picasso's Blue Period.
- cmccann: Clearly the reason why edwardk uses Haskell now is because every C++ compiler has a restraining order against him.
- shachaf: I'm not sure what your question is, but maybe lens is the answer.
- cmccann: * cmccann has concluded that lenses are just a category whose objects are english prepositions and whose morphisms are all unsafeCoerce
- shachaf: Some people, when asking about a problem in #haskell, get a link to okmij.org. Now they have two problems.
- quicksilver: It returns undefined for convenience. I'm not really sure it's that convenient, but that's why.
- edwardk: cmccann: let me get this straight you are saying that someone [mm_freak] who by their very nick admits to being a freak did something freakish?
Top Reddit Stories
- LiquidHaskell: Refinement Types in Haskell via SMT. From (goto.ucsd.edu), scored 71 with 22 comments.
- Hakyll 4.0 released. From (jaspervdj.be), scored 59 with 19 comments.
- When Haskell is faster than C. From (paulspontifications.blogspot.co.uk), scored 52 with 23 comments.
- I'm teaching an introductory 12-week class on Haskell. Join in for a journey!. From (reddit.com), scored 45 with 15 comments.
- Subtractable values are torsors. From (ro-che.info), scored 42 with 15 comments.
- Chordify: extract chord sequences from MP3's using HarmTrace. From (chordify.net), scored 42 with 8 comments.
- Getting Started with Haskell. From (bob.ippoli.to), scored 41 with 8 comments.
- Using AngularJS with Haskell Snap. From (nurpax.github.com), scored 40 with 19 comments.
- Down with kinds: adding dependent heterogeneous equality to to FC. From (cis.upenn.edu), scored 38 with 14 comments.
- Fixing GADTs : Generic recursion schemes for GADTs using fixed points of higher-order functors. From (timphilipwilliams.com), scored 38 with 25 comments.
- What's the importance of Category Theory in Haskell? Is it worth really studying?. From (self.haskell), scored 37 with 60 comments.
- Parsing Markdown with Parsec: How Pandoc does it. From (youtube.com), scored 35 with 13 comments.
- Clckwrks, from the creator of Happstack, is developing into a clean alternative to Wordpress. From (clckwrks.com), scored 34 with 7 comments.
- pipes-safe-1.0 - Resource management and exception handling for pipes. From (haskellforall.com), scored 32 with 27 comments.
Top StackOverflow Questions
- values, types, kinds,… as an infinite sequence? votes: 36, answers: 1
- Why is this a useful warning in Haskell when pattern matching? “Defined but not used” votes: 17, answers: 3
- Why are getArgs and getProgName IO actions? votes: 16, answers: 3
- Can GADTs be used to prove type inequalities in GHC? [duplicate] votes: 14, answers: 2
- Applying Denotational Semantics to design of Programs [migrated] votes: 14, answers: 0
- Examples where compiler-optimized functional code performs better than imperative code votes: 14, answers: 1
- Why is there only one non-strict function from Int to Int? votes: 12, answers: 2
- Dependency injection in Haskell: solving the task idiomatically votes: 12, answers: 3
- What does a Haskell comment starting with `{- |` generally mean? votes: 11, answers: 1
- Is operational really isomorphic to a free monad? votes: 10, answers: 3
Until next time,
+Daniel Santa Cruz
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